body, html {
  padding: 0;
  margin: 0;
}

.list .item {
  padding: 10px 0;
  border-bottom: 1px solid #e5e5e5;
  list-style: none;
  background-color: #fff;
  cursor: pointer;
  transition: background-color 0.3s ease;
  position: relative;
}

.list .item .ico {
  display: block;
  height: 18px;
  width: 18px;
  border-radius: 50%;
  background-color: #007bff;
  position: absolute;
  right: 10px;
  top: 10px;
  color: #fff;
  text-align: center;
  line-height: 18px;
  font-family: 'Courier New', Courier, monospace;
  font-style: normal;
}

.footer {
  position: fixed;
  bottom: 0;
  width: 100%;
  height: 50px; /* 设置footer的高度 */
  background-color: #f5f5f5; /* 设置footer的背景颜色 */
  border-top: 1px solid #e5e5e5; /* 设置footer与上一元素的边框 */
}